Derrick



July 15, 1930; MQRRIS 1,770,654

DERRICK Filed April 21. 1928 Qwuntwo ing the derrick mast shiftedPatented July 15, 1930" EARL H. MORRIS, OF UNION'TOWN, KENTUCKY DERRICKApplication filed April 21,

the derrick mast, enabling the same to be very readily shifted from itsnormal or vertical position to a horizontal position where. it over liesthe derrick body structure, so that the mounting may be convenientlyemployed with any stiff leg derricks or withfolding derricks of the typeshown in my co-pending application, Serial No. 223,353, filed October 1,1927, for Derricks of which application the subject matter of thisapplication is a continuation in part. r v

A further and more specific object of the invention isto provide arotatable mast support upon which the mast is mounted for movement fromvertical to horizontal positions and in which connections are providedwhereby the mast,'when in its vertical position, is very rigidly andfirmly held to the rotatable mounting structure.

These and other objects I attain by the construction shown in theaccompanying draw ing, wherein for the purpose of illustration is showna preferred embodiment of my invention and wherein i Figure 1 is a sideelevation partially in section showing a mast mounting constructed inaccordance with my invention;

Figure 2 is a section on the line 2-2 of Figure 1;

Figure 3 is a section on Figure 1; V V

Figure 4 is afragmentary plan view show to horizontal the line 3-3 ofpositions;

Figure 5 is a detail sectional view showing the manner of locking thebull wheel in position upon the base.

Referring now more particularly to the "drawings, the numeral generallydesignates the lay beams of the main carriage of a derrick and asupporting bed applied to the carriage at one end thereof, providing themounting for a bull wheel pivot pedestal, gen erally designated at 16.This bull wheel pivot pedestal comprises a casting having a cen- 1928.Serial No. 271,898.

tral bore 39. The lower surface of the casting hasears mounting thepivot shaft 41 of sheaves 42 which are substantially tangential to theaxis of the bore. Surrounding the'bore at the upper surface ofthecasting is a boss 44 andsurrounding this boss in spaced relationthereto is a flange 45. The boss'and' its associatedfiange provide astep bearing for the hub 46 of the bull wheel which has a dependingflange 47 surrounding the boss and extending into the annular spaceprovided between the boss and flange. The flange 4'7 and boss 44 havecoacting means at 48 preventing vertical displacement of the bullwheelhub; The rim of the bull wheel, indicated at49,- has a grooved peripheryand is supported from the hub by radiating spokes 50. Sup-V ported fromthe rim in spaced relation there to by rigid braces 51 is a yoke,generally des' ignated at 52, three sides of which are in tegrallyconnected and the fourth 'side of which is a removable plate 53. I 7

The braces 511are'so arranged that; they 54 through this open side. I iUpon the upper surface of the hub are arranged spaced pairs of ears 55and V will not interfere with the passage of'a mast bull 'Wheel 3 56having apertures which align for the recep:

tion of a pivot bolt57 and an anchorvpin "58 The derrick mast 54has-rigidly secured to the lower end thereof a casting 59 embodying:

aperturedears for the passage of the pivot pin 57 andanchor pin 58. Thiscasting has also spaced ap'ertured ears 60 at one side thereof throughwhich is passed a pivot pin 61 providing a pivot for the lower end ofthe boom 37. The hub 46 of the bull wheel and casting59 of the mast havealigned apertures for the passage of the derrick operat ing cablesfrom'the sheaves 42 and these cables are passed over and between sheaves 62and thence'up the boom to the usual sheaves car-, ried by the upper endthereof. The sheaves 62 are arrangedat the opposite side of the mastfromthat which opposes the removable plate 53, so that when the pin 58is removed and thefmast swung to horizontal position,

these cables extend overthe yoke to the head of the mast. Themastwhenrin horizontal position lies overthe carriage and may be 7 g fr1,770,054

held by a suitable support, not herein shown From the foregoing, it willbe obvious that a derrick mast mounted in accordance with my inventionmay be readily shifted from horizontal to vertical position, will befirmly 7 held in its vertical position and is so mounted that it may berotated to place the associated boom many desired position. To rendermore convenient the handling of the mast, means 19 are provided, asindicated at 64, for securing the ull wheel against rotation withrelation to'the carriage. These means are at resent shown as comprisingbolts engaging t e bull wheel flange and the carriage.

15 Means of the construction shown in Figure 5' is employed for thepurpose of preventing the vertical displacement of the bull wheelrespect to its pivot pedestal 16. This means comprises an annular seriesof locking elements 65 which are arranged in a groove 61 formed in theflange 47 and a groove 69 formed in the boss 44. The opposing sidesefithe grooves 67 and 69 only are open, and the locking elements 65contact with the upper g and lower wallsof the grooves so as to maintainthe bull wheel on its pivot pedestal 16. The locking elements 65 aresmaller horizontally or in width than the corresponding dimension ordepth of the groove 67, and they an are maintained in the grooves 69 byset screws 68 so as to maintain the connection hetaweenthebull wheel andits pivot pedestal 1B. set screws 68 are carried by the flange'l'end'have their inner ends arranged in en- It gegcment with the outersides of the locking elements 65.

a It will also be obvious that this structure ieeapable of a certainrange of change and modification without materially departing w --fromthe spirit of the invention and I aceordingly' do not limit myself tosuch specific structure except as hereinafter claimed.

Alma derrick, a main carriage, a casting 5 carried by one end of thecarriage, a bull rotatably mounted upon the casting and; havinganapertured hub, the casting having a bore aligning with the aperture ofthe hill) of the; bull wheel and being provided 5'0 with sheaves for thepassage of operating lines for a derrick, a mast having a casting at itslower end, said casting being pivoted to thedaull wheel to permitmovement of the i mast from a horizontal position where it 55 overliesthe main carriage to a vertical operlttiveposition, said casting andmast having bores aligning with the aperture of the hub of the bullwheel and means for guiding lines passed through said bores to theexterior of y no themst,

In testimony whereof I hereunto afiix my signature. EARL H. MORRIS.

